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Which 3-way splitter to get to use with HD?

Discussion in 'TiVo Series3 HDTV DVRs' started by alee, Sep 13, 2006.

  1. alee

    alee New Member

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    Mar 24, 2002
    New York, NY
    I'll be dividing up the signal 3-ways... TiVo HD, TiVo Series 2 and cable modem. Have had bad luck with splitters in the past, and worry about introducing too much loss which would likely results in dropouts and pixelation esp. in HD.
     
  2. megazone

    megazone Hardcore TiVo Geek

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    Mar 3, 2002
    .worcester.m...
    I'm just using a 4-way splitter (one out unused) that I picked up at Best Buy, or Radio Shack, I forget which. I have two of them - one in the livingroom feeds the S3, DVR-810H, and my TV directly. One in the bedroom feeds the RS-TX20, the S2DT, and the cable box (used by the S2DT).
     
  3. cfaulkner

    cfaulkner New Member

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    Feb 16, 2003
    Boulder, CO
    You'll want a 2 GHz splitter.
     
  4. Dan203

    Dan203 Super Moderator Staff Member TCF Club

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    Apr 17, 2000
    Nevada
    You should get an F terminator cap. It will increase your signal strength to the 3 active outputs, which in turn will make your analog channels look better and your digital channels less prone to breakup.

    Dan
     
  5. Goofball

    Goofball New Member

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    Jun 23, 2004
    Avondale, AZ
    Or just get a 3 tap splitter with two -7.5dB taps and one -3.5dB tap. Never use a splitter with more capacity than you need, you are just throwing signal strength away. Plus with that setup you can move more sensitive equipment, like cable modems over to a lower loss connection.

    The only benefit to using the 4 tap with a terminator is that you will probably spread the signal a bit more levelly, IE: Instead of two -7.5dB and a -3.5dB on a 3 tap you will probably have something like 3 -6dB taps and one unused tap with a terminator on it. I've never seen this done or measured signal off this type of setup so my numbers may be off or I could be completely wrong.

    If anyone reading this doesn't know, the -X.XdB numbers are the amount of signal loss from the input of the splitter to that tap (should be labled right where the tap is). The smaller the negative number, the better.
     
  6. cfaulkner

    cfaulkner New Member

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    Feb 16, 2003
    Boulder, CO
    So, since we're on the topic, where can you get the best splitters? Who makes a real high quality splitter?

    With my new dual tunner coming I'll need 5 (TV (1), Series 3 (2), Series 2 (1), Series 1 (1)). At least I'm assuming the Series 3 will need two connection, perhaps not.
     
  7. ah30k

    ah30k Active Member

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    Jan 8, 2006
    For all those who are being forced into a truck-roll for your CableCARDs, get your money's worth out the tech. They always carry the best splitters in their trucks because it helps the Cable companies maintain a clean RF plant. The techs will give them to you for free. Not that they's just hand you a bunch, but if you need them they will give them to you.
     
  8. Dan203

    Dan203 Super Moderator Staff Member TCF Club

    37,439
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    Apr 17, 2000
    Nevada
    The Series 3 splits the signal internally, so you only need one feed for it. So a simple 4 way splitter will do. As for quality... they're all about the same. Just pick up one at your local RadioShack or Wal-Mart and you'll be fine.

    Dan
     
  9. gconnery

    gconnery New Member

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    Mar 31, 2006
    Petaluma, CA
    I saw something, maybe it was in MegaZone's posts, about the S3 being able to show you cable signal strength. As long as the signal level coming in is in the -10db to +10db range you should be fine. Above that you may also be fine. Below that you may have issues. If you need to increase your signal level, use a powered splitter. You can get one at Radio Shack.
     
  10. Sixto

    Sixto Member

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    Sep 16, 2005
    Been playing with the Series3 and all was well until I starting watching HD.

    I won't have the cablecards until Sunday but found the HD feeds over cable for the networks.

    CBS HD and NBC HD are breaking up every few minutes. The signal strength varies between 76-81. The closer to 76 the more the picture breakup.

    When I remove the ChannelPlus DA-8200BID Distribution Amplifier the signal goes up to 84 steady and the picture is fine.

    The problem is that I need the splitter, especially when I get a few more HD boxes some day.

    Thoughts?
     
  11. NeedTivoHelp

    NeedTivoHelp New Member

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    Nov 22, 2005
    Hi All, I am also getting a series 3. I still have a series 2. What I want to do is to split the video coming out of the cable line (coax) to allow me to have both hooked up. What kind of splitter do i need and will there be a degradation in the signal? And here is an ignorant question perhaps but will I be able to control the channel on the series 2 if I keep the old cable box and essentially record 2 prgorams on the Series 3 9with two cabelcards) and another one on the series 2 at the same time or will the series 2 not be able to record something different. Appreicate the help and advice.
     
  12. alee

    alee New Member

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    Mar 24, 2002
    New York, NY
    According to the advice I got up above, it seems like you need a 2GHz splitter. All splitters incur loss. Another common area for loss is length of cabling. The key is striking a balance.
    Yes... set your Series 3 as DVR 1, and set the Series 2 as DVR 2. Use the switch on the remote to control which TiVo is being controlled.
     
  13. keenanSR

    keenanSR Member TCF Club

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    Oct 12, 2004
    Santa Rosa CA
    A 2GHz splitter is not needed. Cable RF transmission is rarely higher than 860MHz with possibly a few brand spanking new systems reaching 1GHz. 2 GHz splitters are for satellite signals.
     
  14. lasergecko

    lasergecko New Member

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    Mar 13, 2003
    Call your cable company. Cox in Las Vegas provides any splitters you need for free.

    Just be sure you don't put too much attenuation between your main feed to the house and your cable modem! When we moved ours into our bedroom (after the office -> nursery conversion), I accidentally put 28db of attenuation in front of it due to (then) unknown splitters in the attic.

    Look at whatever splitter you get. Some of them have one output that is better or worse than the others. (-7db, -7db, -14db, for example).
     
  15. cfaulkner

    cfaulkner New Member

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    Feb 16, 2003
    Boulder, CO
    Thanks all for the help. I never even thought check on the spiller for the attenuation. I'm fortunate enough to have home runs for all my cable and network connections from a central point in the basement, so no hidden splitters. I do need to check the one in the basement. It's like a ten way splitter so I'll replace it with only what I need (signal to the one outlet). I hope this helps avoid any problems :)

    Thanks again!
     
  16. Innerloop

    Innerloop New Member

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    Sep 10, 2000
    Marin...
    I agree with AH30k here! I was about to post this same advice but he beat me to it!

    I bought a bunch of splitters and stuff at Radio Shack (best they had) and when the cable guy came, he basically said "that's all junk" and installed a splitter with much better specifications (lower impedence loss) for nothing! So take advantage of this definitely!
     
  17. megazone

    megazone Hardcore TiVo Geek

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    Mar 3, 2002
    .worcester.m...
    I've never seen a splitter in stores that wasn't even - 2 or 4 outs. That's why I have the 4s, I needed 2 splitters with 3 outputs, but couldn't find anything but 2 or 4.

    As for the F-cap, where would I find such a thing? RatShack?
     
  18. alee

    alee New Member

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    Mar 24, 2002
    New York, NY
    For what it's worth, it may not be worth getting splitters at all. When Time Warner came for my CC install, the first thing the tech did was meter my outlets, inspect the splitters, and replace all of them with some exotic looking low-loss splitters (see my post about my TWC visit and also see post #14 and #16 above). My signal strength is pretty solid around 98-99 right now on the HD channels, and according to the tech, I now have the ideal signal for the cable modem, the 2 TiVo boxes in the living room, and the 1 in the bedroom.
     
  19. JKay

    JKay New Member

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    Feb 8, 2001
    Santa...
    Several years ago I talked at length to a gentleman that owned a cable franchise in a small community. He was adamant that the typical splitter you buy at a local retailer is of poor quality. His recommendation was to obtain them from your local cable franchise or buy them from a major cable supply house. He was also adamant about not splitting more than absolutely necessary. In other words don’t use a 4-way if a 2-way will do the job
     
  20. cfaulkner

    cfaulkner New Member

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    Feb 16, 2003
    Boulder, CO
    Just had my S3 hooked up and they gave me a new splitter. I asked a few questions and my assumption that a 2 GHz is needed these days for the new digital signals is wrong. Comcast currently uses 1 GHz splitter in my area as their signal is in hte 800 Mhz range. Also, my assumption that Monster products were great is also wrong. The cable guy mentioned a few issues to me. The best you can do it get new splitters and cable from the cable company. They are more than happy to provide them. I mentioned that I might be hooking up another TV soon so my installer left me with a 2 and 3 way splitter. There compmonents are tested for the signal that they use, and they are not all the same.
     

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